.tw-libpoppane {
  height: 0 !important;
}

.tw-previewbody.xdesign .tw-libpoppane {
  width: 300px;
  height: 300px !important;
  text-align: center;
  background: rgba(0, 0, 0, .1);
  border: 1px dotted #333;

  &:after {
    content: "请将弹出面板中的内容拖入此处，拖入的节点请设置为相对布局模式";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: block;
  }
}